ISI Kolkata is a great option for pursuing an M.Tech in Computer Science. You will have great opportunities in Data Science and R&D. If you plan on doing a Ph.D. in Cryptography, this is the best course within India.
ISI Kolkata M.Tech CSE placement profiles for 2020-21 included 19 Data Scientist profiles, 1 Machine Learning Software Engineering profile, and 3 consultant profiles.
As evident by the placement highlights, ISI Kolkata is a great option for Data Science job roles. But if you are interested in job roles like Software Engineer then joining IISc or IIT will be better.
Computer Science Engineering (M.Tech) requires hard work. The course, however, is extremely rewarding if you have not studied the subject yet.
One of my cousins pursued his major in Mathematics prior to joining the course. The topics covered in the course are huge and you will never feel like an outsider.
You will have 22 courses, alongside several project works and internships that were supposed to be covered within 2 years. It is true that the course area is subjectively a lot more than what could be anticipated.
However, it will be highly beneficial as topics including basic computer science subjects, such as Operating systems, Computer architecture will be covered. It hikes up to several advanced courses, Cryptography being one among many others.